LP5520 datasheet(29/46 Pages) TI1

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LP5520

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SNVS440B – MAY 2007 – REVISED MARCH 2016

Product Folder Links: LP5520

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7.6.1.1 Register Bit Conventions

Each register is shown with a key indicating the accessibility of the each individual bit, and the initial condition:

Table 13. Register Bit Accessibility And Initial Condition

Key

Bit Accessibility

Read/write

Read only

–0, –1

Condition after POR

rgb_control (00H) – RGB LEDs Control Register

seq_mode1

seq_mode0

en_fade

pwm_fast

rgb_auto

en_b

en_g

en_r

rw-0

rw-1

rw-0

seq_mode[1:0]

Bits 6 - 7

0 0 – overlapping PWM mode

0 1 – sequential mode with 2 PWM pulses

1 0 – sequential mode with 3 PWM pulses

1 1 – sequential mode with 4 PWM pulses

en_fade

Bit 5

0 – automatic fade disabled

1 – automatic fade enabled

pwm_fast

Bit 4

0 – normal PWM frequency 1.22 kHz

1 – high PWM frequency 19.52 kHz

rgb_auto

Bit 3

0 – automatic compensation disabled

1 – automatic compensation enabled

en_b

Bit 2

0 – blue LED output BOUT disabled

1 – blue LED output BOUT enabled

en_g

Bit 1

0 – green LED output GOUT disabled

1 – green LED output GOUT enabled

en_r

Bit 0

0 – red LED output ROUT disabled

1 – red LED output ROUT enabled

current_control_R (01H) – Red LED Current Control Register

cc_r[7]

cc_r[6]

cc_r[5]

cc_r[4]

cc_r[3]

cc_r[2]

cc_r[1]

cc_r[0]

rw-0

rw-1

rw-0

rw-1

rw-0

rw-1

rw-0

rw-1

cc_r[7:0]

Bits 7 - 0

Adjustment

cc_r[7:0]

Typical driver current (mA)

0000 0000

0000 0001

0.234

0000 0010

0.468

0000 0011

0.702

...

1111 1101

59.202

1111 1110

59.436

1111 1111

59.670

current_control_G (02H) – Green LED Current Control Register

cc_g[7]

cc_g[6]

cc_g[5]

cc_g[4]

cc_g[3]

cc_g[2]

cc_g[1]

cc_g[0]

rw-0

rw-1

rw-0

rw-1

rw-0

rw-1

rw-0

rw-1

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